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|Title:||Pt-Ru/multi-walled carbon nanotubes as electrocatalysts for direct methanol fuel cell|
Leela Mohana Reddy, A.
|Keywords:||Catalyst supports; Chemical vapor deposition; Direct methanol fuel cells (DMFC); Electrocatalysts; Energy dispersive spectroscopy; Platinum; X ray diffraction; Electrocatalyst mixture; Methanol oxidation; Polarization characteristics; Multiwalled carbon nanotubes (MWCN)|
|Citation:||International Journal of Hydrogen Energy, 33(1), 427-433|
|Abstract:||Multi-walled carbon nanotubes (MWNTs) have been synthesized by hemical vapour deposition technique using AB3 alloy hydride catalyst and platinum supported MWNT (Pt/MWNT) and platinum-ruthenium supported MWNT (Pt-Ru/MWNT) electrocatalysts have been prepared by chemical reduction method. MWNT and electrocatalysts have been characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and energy dispersive X-ray analysis (EDX). The anode and cathode electrodes of direct methanol fuel cells (DMFC) have been fabricated using Pt-Ru/MWNT and 1:1 Pt / MWNT + Pt / C electrocatalyst, respectively. Performances of DMFC with these electrodes have been studied at different temperatures and the results have been discussed. A maximum power density of 39.3 mW / cm2 at a current density of 130 mA / cm2 has been obtained, which could be attributed to dispersion and accessibility of MWNT support and Pt-Ru in the electrocatalyst mixture for methanol oxidation reaction. � 2008 International Association for Hydrogen Energy.|
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